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186 results on '"Crotti, E."'

13. The Influence of Heat and Steam Curing on the Properties of One-Part Fly Ash/Slag Alkali Activated Materials: Preliminary results.

Author

Coppola, L., Coffetti, D., Crotti, E., Dell’Aversano, R., and Gazzaniga, G.

Subjects
FLY ash, SLAG, SOLUBLE glass, HEAT, POTASSIUM hydroxide, SODIUM hydroxide, MORTAR
Abstract

This paper presents the preliminary results of an experimental research on the influence of heat and steam curing on the performances of one-part alkali-activated mortars based on low calcium fly ash (FA) and ground granulated blast furnace slag (GGBFS) with different GGBFS/FA ratios. The mortars were manufactured at equal water to precursor ratio and were activated by sodium silicate, potassium hydroxide and sodium carbonate in powder form. In general, by growing the GGBFS/FA ratio, the workability of fresh mortars decreases and the elasto-mechanical performance increases, independently of curing conditions. The heat and/or steam curing temperatures equal to 40°C or 60°C promote the development of higher early compressive strength respect to standard curing conditions (20°C), especially at high GGBFS/FA ratios, while no advantages were detected at longer ages. [ABSTRACT FROM AUTHOR]

Published
2019
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18. Gli insetti e il loro controllo

Author

Frati F, Dallai R, Callaini G, Crnjar R, Solari P, Giordana B, De Eguileor M, Grimaldi A, Ottaviani E, Tettamanzi G, Casartelli M, Leonardi MG, Gigliotti S, Malva C, Gargiulo G, Cavaliere V, Rotundo G, De Cristoforo A, Turillazzi S, Bosco D, Arcà B, Della Torre A, Pombi M, Battisti A, Bin F, Rosi C, Pavan F, Duso C, GARONNA, ANTONIO PIETRO, Squartini A, Alberghini S, Alma A, Daffonchio GD, Balloi A, Bandi C, Crotti E, Damiani C, Favia G, Gonella E, Mandrioli M, Montagna M, Ricci I, Sacchi L, Gasperi G, Scolari F, Segale A., PENNACCHIO, FRANCESCO, MANCINI, DONATO, SALVEMINI, MARCO, SACCONE, GIUSEPPE, POLITO, CATELLO, VIGGIANI, GENNARO, CARPUTO, DOMENICO, RAO, ROSA, COPPOLA, MARIANGELA, CORRADO, GIANDOMENICO, Frati F, Dallai R, Callaini G, Crnjar R, Solari P, Pennacchio F, Mancini D, Giordana B, De Eguileor M, Grimaldi A, Ottaviani E, Tettamanzi G, Casartelli M, Leonardi MG, Gigliotti S, Malva C, Gargiulo G, Cavaliere V, Salvemini M, Saccone G, Polito C, Rotundo G, De Cristoforo A, Turillazzi S, Bosco D, Arcà B, Della Torre A, Pombi M, Battisti A, Viggiani G, Bin F, Rosi C, Pavan F, Duso C, Garonna AP, Carputo D, Rao R, Coppola M, Corrado G, Squartini A, Alberghini S, Battisti A, Alma A, Daffonchio GD, Balloi A, Bandi C, Crotti E, Damiani C, Favia G, Gonella E, Mandrioli M, Montagna M, Ricci I, Sacchi L, Gasperi G, Scolari F, Segale A, Francesco Pennacchio, Frati, F, Dallai, R, Callaini, G, Crnjar, R, Solari, P, Pennacchio, Francesco, Mancini, Donato, Giordana, B, De Eguileor, M, Grimaldi, A, Ottaviani, E, Tettamanzi, G, Casartelli, M, Leonardi, Mg, Gigliotti, S, Malva, C, Gargiulo, G, Cavaliere, V, Salvemini, Marco, Saccone, Giuseppe, Polito, Catello, Rotundo, G, De Cristoforo, A, Turillazzi, S, Bosco, D, Arcà, B, Della Torre, A, Pombi, M, Battisti, A, Viggiani, Gennaro, Bin, F, Rosi, C, Pavan, F, Duso, C, Garonna, ANTONIO PIETRO, Carputo, Domenico, Rao, Rosa, Coppola, Mariangela, Corrado, Giandomenico, Squartini, A, Alberghini, S, Alma, A, Daffonchio, Gd, Balloi, A, Bandi, C, Crotti, E, Damiani, C, Favia, G, Gonella, E, Mandrioli, M, Montagna, M, Ricci, I, Sacchi, L, Gasperi, G, Scolari, F, and Segale, A.

Published
2014

20. Isolation of a Wickerhamomyces anomalus yeast strain from the sandfly Phlebotomus perniciosus, displaying the killer phenotype

Author

Martin, E, Bongiorno, G, Giovati, L, Montagna, M, Crotti, E, Damiani, Claudia, Gradoni, Luigi, Polonelli, L, Ricci, Irene, Favia, Guido, Epis, Sara, Martin, E., Bongiorno, G., Giovati, L., Montagna, M., Crotti, E., Damiani, C., Gradoni, L., Polonelli, L., Ricci, I., Favia, G., and Epis, S.

Subjects
Leishmania, fungi, Molecular Sequence Data, phlebotomine sandflie, RNA, Fungal, Pichia, Phenotype, Larva, Phlebotomus, parasitic diseases, Animals, biocontrol, yeast community, Phylogeny
Abstract

The yeast Wickerhamomyces anomalus has been studied for its wide biotechnological potential, mainly for applications in the food industry. Different strains of W. anomalus have been isolated from diverse habitats and recently from insects, including mosquitoes of medical importance. This paper reports the isolation and phylogenetic characterization of W. anomalus from laboratory-reared adults and larvae of Phlebotomus perniciosus (Diptera: Psychodidae), a main phlebotomine vector of human and canine leishmaniasis. Of 65 yeast strains isolated from P. perniciosus, 15 strains were identified as W. anomalus; one of these was tested for the killer phenotype and demonstrated inhibitory activity against four yeast sensitive strains, as reported for mosquito-isolated strains. The association between P. perniciosus and W. anomalus deserves further investigation in order to explore the possibility that this yeast may exert inhibitory/killing activity against Leishmania spp.

Published
2015

23. ‘Candidatus Liberibacter europaeus’ sp. nov. that is associated with and transmitted by the psyllid Cacopsylla pyri apparently behaves as an endophyte rather than a pathogen

Author

Raddadi, N., Gonella, Elena, Camerota, Caterina, Pizzinat, ALAN CLAUDIO, Tedeschi, Rosemarie, Crotti, E., Mandrioli, M., Bianco, P. A., Daffonchio, D., Alma, Alberto, RADDADI N, GONELLA E, CAMEROTA C, PIZZINAT A, TEDESCHI R, CROTTI E, MANDRIOLI M, BIANCO PA, DAFFONCHIO D., and ALMA A

Subjects
pear plants, Molecular Sequence Data, fungi, food and beverages, Sequence Analysis, DNA, Hemiptera, Pyrus, RNA, Bacterial, Rhizobiaceae, RNA, Ribosomal, 16S, DNA, Ribosomal Spacer, Animals, Cacopsylla pyri, Candidatus Liberibacter, Phylogeny, Plant Diseases
Abstract

'Candidatus Liberibacter spp.' cause serious plant diseases. 'Candidatus Liberibacter asiaticus', 'Ca. L. americanus' and 'Ca. L. africanus' are the aetiological agents of citrus greening (Huanglongbing) in Asia, America and Africa. 'Candidatus Liberibacter solanacearum' causes diseases in Solanaceae in America and New Zealand. All four species are vectored by psyllid insects of different genera. Here, we show that the pear psyllid pest Cacopsylla pyri (L.) hosts a novel liberibacter species that we named 'Ca. Liberibacter europaeus'. It can bloom to high titres in the psyllid host, with more than 10(9) 16S rRNA gene copies per individual. Fluorescent in situ hybridization experiments showed that 'Ca. L. europaeus' is present in the host midgut lumen, salivary glands and Malpighian tubules. 'Candidatus L. europaeus' has a relatively high prevalence (51%) in C. pyri from different areas in the Piedmont and Valle d'Aosta regions in Italy and can be transmitted to pear plants in experimental transmission trials. However, even though high titres of the bacterium (more than 10(8) 16S rRNA gene copies g(-1) of pear plant tissue) could be detected, in the pear tissues no specific disease symptoms could be observed in the infected plants over a 6-month period. Despite liberibacters representing potential quarantine organisms, 'Ca. L. europaeus', first described in Italy and Europe, apparently behaves as an endophyte rather than a pathogen.

Published
2011

36. Microbial symbionts : a resource for the management of insect-related problems

Author

Crotti, E, Balloi, A, Hamdi, C, Sansonno, L, Marzorati, M, Gonella, E, Favia, Guido, Cherif, A, Bandi, C, Alma, A, Daffonchio, D., Boon, Nico, and Verstraete, Willy

Subjects
CERATITIS-CAPITATA, DIROFILARIA-IMMITIS, Insecta, MACROFILARICIDAL ACTIVITY, 16S RIBOSOMAL-RNA, PARATRANSGENIC CONTROL, fungi, LIFE-SHORTENING WOLBACHIA, Biology and Life Sciences, LYMPHATIC FILARIASIS, Bacterial Physiological Phenomena, DROSOPHILA-MELANOGASTER, DOXYCYCLINE TREATMENT, Animals, Pest Control, Biological, Symbiosis, Review Articles, BACTERIAL SYMBIONTS
Abstract

Summary Microorganisms establish with their animal hosts close interactions. They are involved in many aspects of the host life, physiology and evolution, including nutrition, reproduction, immune homeostasis, defence and speciation. Thus, the manipulation and the exploitation the microbiota could result in important practical applications for the development of strategies for the management of insect‐related problems. This approach, defined as ‘Microbial Resource Management’ (MRM), has been applied successfully in various environments and ecosystems, as wastewater treatments, prebiotics in humans, anaerobic digestion and so on. MRM foresees the proper management of the microbial resource present in a given ecosystem in order to solve practical problems through the use of microorganisms. In this review we present an interesting field for application for MRM concept, i.e. the microbial communities associated with arthropods and nematodes. Several examples related to this field of applications are presented. Insect microbiota can be manipulated: (i) to control insect pests for agriculture; (ii) to control pathogens transmitted by insects to humans, animals and plants; (iii) to protect beneficial insects from diseases and stresses. Besides, we prospect further studies aimed to verify, improve and apply MRM by using the insect–symbiont ecosystem as a model.

Published
2012

49. Microbial symbioses

Author

Gonella, E., Crotti, E., Mandrioli, Mauro, Sacchi, L., Bandi, C., Daffonchio, D., and Alma, A.

Published
2011

50. Gut microbiome dysbiosis and honeybee health

Author

Hamdi, C., Balloi, A., Essanaa, J., Crotti, E., Gonella, Elena, Raddadi, N., Ricci, I., Boudabous, A., Borin, S., Manino, Aulo, Bandi, C., Alma, Alberto, Daffonchio, D., Cherif, A., C. Hamdi, A. Balloi, J. Essanaa, E. Crotti, E. Gonella, N. Raddadi, I. Ricci, A. Boudabou, S. Borin, A. Manino, C. Bandi, A. Alma, D. Daffonchio, and A. Cherif

Subjects
biological control, gut homeostasis, microbial climax community, symbiosis, Microbial climax community, Biological control, Gut homeostasis, Symbiosis
Abstract

Since a few decades, apiculture is facing important economic losses worldwide with general major consequences in many areas of agriculture. A strong attention has been paid towards the phenomenon named Colony Collapse Disorder in which colonies suddenly disappear with no clear explanations. Honeybee colonies can be affected by abiotic factors, such as environmental pollution or insecticide applications for agricultural purposes. Also biotic stresses cause colony losses, including bacterial (e. g. Paenibacillus larvae) and fungal (e. g. Ascosphaera apis) pathogens, microsporidia (e. g. Nosema apis), parasites (i.e. Varroa destructor) and several viruses. In the light of recent research, intestinal dysbiosis, considered as the relative disproportion of the species within the native microbiota, has shown to affect human and animal health. In arthropods, alteration of the gut microbial climax community has been shown to be linked to health and fitness disequilibrium, like in the medfly Ceratitis capitata for which low mate competitiveness is determined by a gut microbial community imbalance. According to these observations, it is possible to hypothesize that dysbiosis may have a role in disease occurrence also in honeybees. Here we aim to discuss the current knowledge on dysbiosis in the honeybee and its relation with honeybee health by reviewing the investigations of the microbial diversity associated to honeybees and the recent experiments performed to control bee diseases by microbial symbionts. We conclude that, despite the importance of a good functionality of the associated microbiota in preserving insect health has been proved, the mechanisms involved in honeybee gut dysbiosis are still unknown. Accurate in vitro, in vivo and in field investigations are required under healthy, diseased and stressed conditions for the host

Published
2011

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